Builders for options

[kivikakk]

I keep breaking semver compatibility by adding options. Change public-facing options to builders so adding an option is backwards-compatible.

I'm not super sold on this variety of builder, namely the way you need to call options.x for several xs if you want to modify multiple kinds. Maybe I could roll all the builder functions into one impl.

[YJDoc2]

Hey, If you're still interested in adding a builder implementation, what do you think of using https://crates.io/crates/derive_builder for this? That will generate the builder automatically, and one won't have to remember to specifically add a corresponding builder function. Also for the semvar-breaking issue, what do you think of adding non-exhaustive attribute to the options structs? That way they cannot be manually instantiated, and won't break others depending on them.

[kivikakk]

Oh yeah, that seems way better. Making them non-exhaustive also seem really good; possibly could just go with that instead entirely. I don't really have the time in life to make either of these happen myself at the moment, but would certainly appreciate help going in either direction.

[YJDoc2]

Hey, I would like to help and maybe send a PR if you'd be willing to review it and accept it. Let me know.
The builder option would provide an easier way to build options rather than having type each of the struct option/ use ... . The non-exhaustive would allow extending the options without breaking the depending crates, as it would force them to have a _ option in match. Both seem a good thing to add. Let know which ones would you like to add.

[kivikakk]

@YJDoc2 Sorry I never replied to your comment! Life got a lot.

I'd be very happy to accept such a PR. Let me know if this is something you still have any interest in taking on — and I understand it might not be, of course, given the passage of time — otherwise I'll likely get to it soon while tidying up Comrak.

[YJDoc2]

Hey, no worries! 😄

I am still interested in helping out, but I'll need to take another look at what I was suggesting as I seem to have forgotten that myself 😂

Also, I am a bit busy with other stuff at the moment as well, so how about this :
I will try to get a PR opened up as I can, that adds the suggested builder stuff ; but in case you get to tidying up before it, feel free to continue with it and close this as appropriate.

In case you need a more concrete timeline, let me know, I'll try to get it done sooner, or just pass on it 👍

[YJDoc2]

@kivikakk Opened #292 , please take a look!